Grim Flayer

The graveyard payoff that earns its place by attacking rather than building toward a deathstar turn. Most delirium cards reward you for filling a graveyard you were going to fill anyway; this one closes the loop in the combat step, surveiling three on a connection so that the same hit that pressures life totals also assembles the four card types it needs to grow. That self-feeding loop is the design's whole tension: the trample is what lets a 2/2 punch through chump blockers to land the trigger, and the surveil is what turns the delirium threshold into something the card builds for itself. The downside is honest. Before delirium comes online it is a fragile two-drop that dies to nearly every cheap removal spell in the game, and once it connects the surveil often flips the threshold on immediately, leaving an opponent only the instant-speed window to answer it before it stands up as a 4/4. The distinguishing trait is that the reward and the engine are a single action: every point of combat damage advances both the clock and the graveyard, so one unanswered attack tends to snowball into a body that should have been killed when it was small. Black-green attrition strategies had wanted a threat that fueled itself for years; this one folds the engine into a creature that also just kills you.